Date: Sun, 22 Feb 2026 13:27:07 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 293364] base libc++ incompatibilities with GCC 15, built-in traits Message-ID: <bug-293364-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293364 Bug ID: 293364 Summary: base libc++ incompatibilities with GCC 15, built-in traits Product: Base System Version: CURRENT Hardware: Any URL: https://github.com/llvm/llvm-project/pull/137871 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: mandree@FreeBSD.org CC: salvadore@freebsd.org, secteam@FreeBSD.org Blocks: 293329 Flags: mfc-stable15?, mfc-stable14?, mfc-stable13?, needs_errata?(secteam@FreeBSD.org) CC: secteam@FreeBSD.org Greetings, GCC 15 bombs out when building C++ stuff whilst using libc++ as its -stdlib=, which is required to obtain ABI compatibility with requisite libraries built through other ports. However, libc++'s headers apparently use built-ins such as __decay with GCC 15 in places where GCC 14 and older would not, and GCC complains. A good explanation is this comment: https://github.com/NVIDIA/stdexec/issues/1375#issuecomment-2303803306 The Upstream LLVM project seems to have fixed this through https://github.com/llvm/llvm-project/pull/137871 - can we cherry-pick these for FreeBSD 15, 14, 13's libc++? If not, what else would be the recommended solution? Is there some way to override this? There are related issues with suggestions that haven't materialized. https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260139#c3 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260139#c4 Unsure what this would give us: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215193 Referenced Bugs: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293329 [Bug 293329] graphics/rawtherapee: Fails to build with GCC 15: fatal error: bits/functexcept.h: No such file or directory -- You are receiving this mail because: You are the assignee for the bug.home | help
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